Here are 3 good free services to try fonts on a live website. The best part is you can get the link to share website with changed font. So sharing the website with the applied font is also possible. You can also use other features like download the fonts, apply font of titles only, apply fonts on body text, etc.

Here are 2 free websites to extract font from PDF files. Upload a PDF from PC and then these sites automatically do the work to show which fonts were used in the input PDF file. You can also extract attachments, text, and images from PDF.